Thanks for your reply. Now the only inspector is builder's inspector. He works for the builder. If he said the inspection met the standards regarding the elevated basement floor, should I accept his words as he is a licensed inspector. According to the rule, the new house buyer can not bring their own inspector. So I am kind of suspect the whole inspection process but nothing else I can do.
Actually thicker basement floor is more ideal. 2" thicker is better than 2" thinner even though it reduces the ceiling height. I see no reason to be mad about.
Thanks for everyone's valuable input. It has been an exciting and stressful process for building our new house. However it also is a good learning process.